Data from a real-world study assessing Johnson & Johnson's Covid-19 vaccine finds it is 73.6% effective, according to new research
Data from a real-world study assessing Johnson & Johnson's Covid-19 vaccine finds it is 73.6% effective, according to research published Tuesday in the journal JAMA Network Open.
The study evaluated patients within the Mayo Clinic Health System between February and July of this year. The researchers followed nearly 9,000 patients vaccinated with the J&J vaccine and nearly 89,000 patients who were unvaccinated. They looked specifically to see how many of them tested positive for Covid-19.A nurse prepares a dose of a Johnson & Johnson Covid-19 vaccine in Chicago.Among the 8,889 vaccinated patients, 60 had a positive PCR test.